US2650769A - Bunch building method and apparatus - Google Patents

Description

Sept 1, 1953 E. J. BERRY 2,650,769

` BUNCH BUILDING METHOD AND APPARATUS Filed June 13, 1946 5 Sheets-Sheet 1 Septl, 1953 E. J. BERRY 2,650,769

BUNCH BUILDING METHOD 4AND APPARATUS s sheets-sheet 2 Filed June 13, 1946 Sept. l, 1953 Filed June 15, 1946 E. J. BERRY K BUN'CH BUILDING METHOD AND APPARATUS 3 Sheets-Sheet Z5 Patentecl Sept. 1, 1953 BUNCH BUILDING METHOD AND APPARATUS Edward J. Berry, Providence, R. I., assignor to Draper Corporation, Hopedale, Mass., a corporation of Massachusetts Application June 13, 1946, Serial No. 676,445

20 Claims. 1

This invention relates to filling winders. More particularly the invention is concerned with a method and apparatus for building a finding bunch of lling on a bobbin at the end of the bobbin winding operation. Reference is had especially to a bobbin winding operation such as is performed by the Whitin-Schweiter automatic filling bobbin Winder.

According to the practice to this time, after a package is madey it is customary for the winder to secure the end of the thread by passing it back along the package in a diagonal manner and then forming a few turns. This provides so-called back-wind. When the bobbin is inserted in a loom battery, it is necessary for the operator to nd the thread forming the back Wind, and to clear it so that it may be hand-tied to the battery upon insertion of the bobbin therein and preparatory to transfer of that bobbin to the shuttle and to the shuttle making its first pick across the loom. The operation of iinding andA clearing the end of thread, as well as the handtying step, involves an appreciable delay in renewing bobbins with consequent increase in cost of fabric production.

An object of the invention generally is to deal with this problem in connection with bobbin winders, and to devise means for improving the finding and clearing operation noted. It is further an object of the invention to provide a finding bunch so arranged as to facilitate securing a bobbin and its lling in a loom shuttle battery whether the operation is performed by hand or by automatic mechanism. Other objects will be apparent from the following description of the invention.

With the foregoing considerations in mind, I have devised a method and apparatus for building a separate nding bunch on the end of a bobbin without interfering with the usual filling bobbin Winder operations. The bunch, when properly prepared, may be removed from the end of the bobbin very easily and quickly and may serve as a convenient means for extending the thread to secure it to the usual thread holder of a conventional battery, or for retaining the end of a filling thread in an automatic type battery during the rst pick of the shuttle across the loom.

The accompanying drawings illustrate a preferred embodiment of the invention, in which Fig. 1 is a perspective View of a lling bobbin Winder equipped with bunch building and sealing mechanism according to the invention;

Fig. 2 is another perspective View of a Winder embodying the invention as viewed from the opposite side to that illustrated in Fig. l;

Fig. 3 is a detail plan view of an adhesive applying mechanism;

Fig. 4 is an exploded view illustrating further details of the sealing mechanism;

Fig. 5 is an elevational View of the adhesive applying means of Fig. '3

Fig. 6 is a detail cross-sectional View of the adhesive applicator valve;

Fig. 7 is a side elevation of a carriage retraction cam and a bunch-building cam;

Fig. 8 is a front elevation of the carriage retraction cam; and

Fig. 9 is a front elevation of the bunch-builder cam.

The general plan of the apparatus includes a bunch-building mechanism operatively connected to the doiiing mechanism and thread guide of a Whitin-Schweiter automatic iilling bobbin winder. The details and operation of this winder are evident in U. S. Patents 2,268,308; 2,268,309 and 2,268,310, and more than a general mention of its conventional operation to Wind a weft package need not be given here. When the package has been nearly made, the last few turns of the spindle are utilized to build, at a point just beyond the main body of the package, a nding bunch. The bunch is rather lightly Wound so that the turns of lling, in a body, may be readily pulled off over the end of the spindle. As it is being built, the bunch is contacted by a sealing or adhesive applying mechanism and in this way receives an adhesive material which tends to stick together the turns of filling. An adhesive agent of such character is chosen that a positive force such as a firm tug on the thread is required to unwind the turns of the bunch from each other. The adhesive is so applied as not to adhere the bunch to the bobbin, but to provide for sliding movement between the bobbin and the bunch as a whole. In this way, undesired unwinding of the bunch is avoided in handling, and yet the bunch may be removed as a solid body without difiiculty, at the time of loading the bobbin in a loom shuttle battery.

These features are more readily understood from the following detailed description of the mechanism shown in the drawings. Illustrated therein is the filling bobbin Winder. The conventional cycle of operations of this Winder Will rst be considered briefly. A thread 9 (Fig. 1) is taken from the end of a supply package and passed through a tension device of the type commonly used in the art. From here the thread moves through an abrasion resistant guide indicated in the drawings by numeral I0, which func- 3 tions as a stop motion element, and on through an oscillating thread guide I4.

The thread guide I4 traverses the thread on a rotating bobbin I1 and moves progressively forward until a predetermined size of bobbin is formed. This is accomplished by a thread guide carrier slidable on guide rods and secured by its clamping portion 14a to a chain I6 which is intermittently moved from left to right as viewed in Fig. 1, by a ratchet and pawl assembly I8. When the main winding has been accomplished, a lug I5 on the thread guide carrier hits an adjustable stop I9 fixed to a rod 2l. The latter member is slidably held under tension in a bearing 23 and extends rearwardly to a point where it is attached to an arm 25, in turn controlling the start of rotative movement of a doiing shaft I2, the mechanism within the casing for that purpose being similar to that described in U. S. Patent 2,268,308.

As the lug I5 hits the stop I8 and moves the rod 2I a predetermined distance, the doiiing shaft starts to rotate and makes one complete turn at a rather slow speed, that being the only turn or revolution it makes during a single cycle. During this single rotation of the dong shaft, the bobbin makes its last few revolutions. This interval is utilized, conventionally, for back-wind, or for winding down a so-called tail over the package, where such an operation is desired. The bobbin is then usually transferred to a hopper and a new bobbin is inserted and threaded to begin another winding operation, all as described in that patent. A carriage retraction cam 22 on doii'ing shaft I2, during the rotation of the latter member, actuates an arm 20, which causes the pawls for the ratchet wheel at I8 to be withdrawn, whereupon the thread guide carrier is retracted by weights or springs, as the case may be.

In accordance with the present invention, the above described conventional movements are left undisturbed. However, movement of the dofng shaft is utilized, and particularly that interval during its rotation when back-wind is conventionally provided for, and while the spindle is making its last few revolutions, to effect the building and treatment of the finding bunch.

On the dofng shaft, I provide a cam member 24 (Figs. 1, 7 and 9). This cam is rotatively adjustably mounted on the dong shaft adjacent to the cam 22 in the manner shown in the drawlngS.

A screw 22a (Fig. 7), passing through an arcuate slot 22b in the carriage retraction cam 22 and through a similar slot in flange 22e fixed to the doiiing shaft, is threaded into inside tip bunch building cam 24, Fig. 7. It will be seen that this screw affords a simultaneous adjustment of the angular positions of both cams 22 and 24 on the dofng shaft. The dofiing shaft with attached fiange 22e, cam 22, and cam 24, rotate as a unit in whatever angular relation they may have been adjusted together by means of this screw. The dofiing shaft rotates in an anticlockwise direction, as viewed in Fig. 1. It will be observed therefore that a clockwise adjustment of cam 22 relative to the dofng shaft, effects a later retraction of carriage I4-A. Adjustment of cam 24 varies the time at which the finding bunch is started while the position of cam 22 determines the size of the bunch by advancing or retarding as desired, the return of the carriage.

Directly above the cam 24 is a lever 28 mounted on a pivot 29. Projecting downwardly from the lever is a tip 26 adapted to be engaged Til by the cam 24 in the position of the latter member illustrated in Fig. 1. Movement of the cam releases the lever, allowing it to rotate in a counterclockwise direction as viewed in the gure noted, such rotation being determined by the influence of spring 34.

At its upper extremity, the lever 28 is formed with a slot 3|,v through which is received a rod 32 which extends along the entire side of the Winder. The left-hand end of rod 32, as viewed in Fig. 1, is passed through a bracket 4I and carries a compressed spring member 34 which normally tends. to pull the rod member toward the back of the winding head or in a direction from right to left as viewed in Fig. 1.

Numeral 40 denotes a spacing collar secured on the rod at a point adjacent to the top of the -slotted pawl. At the opposite side of the slotted pawl is a stop member 30, adjustably fixed to l the rod. The rod carries at its intermediate portions a bracket 42 and has its end supported in a bearing 43 at the opposite end of the Winder. An actuating dog or stop member 36 is fixed on the rod in spaced relation to the bearing 43. The arm of the thread guide I4 is formed with a tail piece 38 which projects downwardly into the path of movement of the dog 36 when retracted by the rod 32.

At the extreme right-hand end of Fig. 1 are shown two split collar sections 46 and 48 which form a clamp and are secured on a relatively fixed cylindrical member of the Winder by screws or other clamping means. The top collar section 48 has pivotally mounted thereon on a shaft which extends upwardly therefrom a block 50 which is secured by means of a sleeve portion 52. Extending through the top collar section is a thread deflecting stop 44, whose inner extremity is bent into the form of a right angle positioned at a point above the end of the spindle. A second stop member 54 mounted through the oscillatable block 5D also projects in the direction of the bobbin and slightly to one side thereof in the path of movement of the arm carrying the thread guide I4. The block 50 is formed with an arm 56, which carries a container 58 in which is received an adhesive material. At the base of the container is connected a sleeve-type ball ap- Y plicator, better shown in Figs. 3, 4 and 6. This applicator includes a cylindrical member, a resiliently held ball 62, and a back plate formed with an aperture 64. The bearing block 50 is normally held in the position shown in Fig. 3 by means of a spring supported by stop 66. A second stop 68 maintains the block in the position noted in Fig. 3 until disturbed from position shown, by virtue of arm (carrying thread guide I4) striking against arm 54.

In operation, as soon as the main winding of the package has been completed, the lug I5 on the thread guide carrier hits the adjustable stop I9, causing the doiiing shaft to start its rotation through one revolution and then coming to rest. During that revolution the doiiing shaft causes a number of movements to take place in substantially the following order: Rotation of the bunch builder cam 24 releases the engaging lever 28, in turn permitting the spring 34 to retract the long rod 32 to a position limited by a spacing collar 40 striking bracket 4I The dog 36 near the forward end of the rod 32, in moving rearwardly picks up the tail piece 38 on the thread guide holder, thereby swinging the thread guide arm to a position further toward the tip of the bobbin so that the thread may be wound at a point adjacent the end of the bobbin and in spaced relation to the main package of filling. In this position of the guide, the thread l0 is pressed against the extremity of the thread-deiiecting stop 44, which causes a number of turns to be wound at one localized area on the bobbin, thus building the finding bunch 12, Figs, 2 and 3. Spindle rotation is then stopped. The thread carrier is next retracted, the spindle head is retracted from driving contact with the bobbin, and the bobbin is dropped into a hopper in the usual way where it is temporarily held until thread between the filled and a newly entering bobbin is severed. The bobbin is then allowed to fall into a container in the usual manner. The doiling shaft I2 continues its rotation to a point near the end of its revoluition with the attached bunch builder cam 24 then picking up the tip 26 of the lever 28 and restoring the tip bunch buildlng control mechanism to a starting position. From this point on, a new bobbin is inserted and threaded, `a reserve bunch is built, and the main winding is resumed to repeat the cycle of operation. The cam 22 determines the proper point of retraction of the thread guide carrier by tripping the return mechanism in a conventional manner. Of course, that is done right after the tip bunch has been completed.

Operation of the adhesive applying mechanism occurs as hereinafter described during winding the tip bunch and is begun by moving the arm or" the thread guide I4 into the extreme position above described. As the arm swings to the right, due to the action of the retracted rod 32 against the tail piece 38, it comes into contact with a hook member 54 and rotates the whole applicator unit, including the block 58, the container 58, and the applicator 60, until the stop screw 66 hits against the upper collar section 43, as may be more clearly observed in Fig. 5.

Meanwhile the bunch 'l2 is being built and during its winding, the ball 52 is brought into contact with the bunch with a positive pressure which depresses the ball against the action of its retaining spring, thus allowing adhesive material to escape by the ball on to the bunch. rI 'he action of the sealer is very fast, with the ball contacting the filling for a very short period during which most of the turns are stuck together, although the adhesive material does not come into contact with the underlying surface of the bobbin. When the thread guide is retracted, the block 50 springs back to a starting position limited by a set screw 6B striking against the upper portion of the collar section d8.

It should be observed that the orice 64 in the applicator tube permits adhesive to lill the space around the ball and applicator tip in a time interval suflicient for supplying each single tip bunch but functions to prohibit a sudden return of uid to the container and prevents application of an excess of adhesive. The adhesive is preferably one which sets relatively quickly and which produces a rather tight bond or adhesion between adjacent turns of thread. An adhesive employing a starch or glue base, containing an agent for inducing quick drying, may be used.

By reducing the adhesive property of the cementing fluid, and by accentuating the quickdrying property of the fluid so that it is better adapted to the specic time interval available during the building of the tip or finding bunch, very satisfactory bonding results may be obtained. At the same time, by using only very .small amounts of the adhesive as limited by the vof adhesive is so timed by setting the member 54 that two or three, or possibly more layers of bunch filling are formed before the bunch builds up to a size sufcient to depress the ball and allow adhesive to escape on to the bunch. Due to this timing, the adhesive is prevented from directly coming into contact with the bobbin surface.

It is pointed out that due to the character of the adhesive and the manner in which it is applied, it becomes possible to carry out a carefully controlled degree of sealing. This avoids sticking the thread upon the bobbin tip and yet the adhesive is so applied that practically each involved turn in the bunch 'I2 is relatively rmly attached to adjacent turns, thus requiring a reasonably strong pull or vigorous handling to separate the turns of the thread and in this way avoiding undesirable raveling or unwinding of the lilling bunch. Since the bunchvas a whole may be readily separated from the spindle, it serves as a convenient body which can be grasped and held by hand or by automatic mechanism such as grippers, either to clear the lling in preparation for hand-tying, or to hold the lilling during automatic installation and manipulation in a battery.

In the Whitin-Schweiter Winder shown in the drawings, the thread 9 passes from a supply, under tension, through thread guide lil supported on a control arm lila, and thence on through oscillating thread guide I 4 and to the package. Any release of tension in the thread allows arm Illa to be drawn toward the rear (under inuence of a spring). This stops the machine. The stopping rnotion acts whenever the supply becomes exhausted or the thread breaks for any reason. This arrangement is subject to the diiculty of undesired stopping. As the thread slacks up when the carriage retracts, carrying the thread from the front end of the bobbin toward the rear, the bobbin falls into a hopper, and during this falling, further slack is given the thread.

The resulting decrease in tension on the thread allows the control arm lila to stop the machine.

A further important aspect of the invention includes means for overcoming this unintended stopping. The addition of the long rod 32 furnishes a means of holding arm ida in an inoperative range during the dofng cycle when the thread tends to slacken; but allows arm lila to remain operative at all other times.

When rod 32 moves rearwardly an abutment 42, which is adjustably iiXed on rod 32 by clamping dog 42a, strikes tab 32h on a pivoted arm 42e which is held under tension in the position shown in Fig. l. The arm 42e is thus rotated and its end 42d is brought into a position such that it holds arm Ilia from operating through its normal range or swinging suiiciently to stop the machine. As the position noted need only be assumed for a short interval during the cloning cycle, the control arm la functions in its usual manner at all other times.

It will be evident from the foregoing descrip- .tion that the structure of the invention and the method of operation noted afford 'several advantages. The diiculty and loss of time resulting from attempting to clear the back wind of a bobbin prior to being inserted in a battery is greatly reduced since the bunch presents a convenient body which may be gripped by an operator and easily pulled off over the end of the 7 spindle. The use of a clearing bunch at the point noted is further advantageous in making possible automatic removal `of the bunch and automatic tying of the end of the thread Vin 'a loom battery. The particular arrangement of parts is so designed that no interference with the normal operation of the machine is caused.

In the speciiication and claims the terms yarn and thread have been vused more or less interchangeably, and the invention is by no means limited to Winding a isingle spun stran'd or 'to a thread combined from several strands, but equally applicable to Winding a tip bunch fafter 'and spaced from the main yarn 'package during the formation of such a package Afrom any yarn, filament, thread or combination thereof.

It is intended that vthe Vmethod may be modifled in various respects, andthe particular bunch building mechanism may be varied in accordance With the rscope of the invention vas deiined by the appended claims.

I claim:

1. YA Viilling bobbin Winder `comprising means for supporting and rotating `a bobbin, an oscillating thread guide member Vfor building 4a main package on the bobbin, ldoiiing mechanism operative upon completion `of said =main package on the bobbin, means actuated by said doiling mechanism for advancing the oscillating thread-guide into a position directly above the 'outer end of the bobbin, and thread-deflecting vmeans sepa'- rate from `the oscillating thread guide 4'for limitling the traverse of the lthread as it is 'applied by the `oscillating thread guide in its advanced position to form a tip bunch.

2. A filling bobbin Winder comprising 'means `for supporting and rotating-a bobbin, anosci-llat- Aing thread guide member `for lbuilding a main package on a bobbin, doffing mechanism operative upon completion 'of the main package ron the bobbin, a retracting element slidably secured adjacent to the oscillating thread guide member, cam means driven by said doiiing mechanism, said cam means being operatively 'connected to the retracting element to provide movement thereof, stop means on said retracting element adapted to engage against the said thread -guide member and move the latter member into 'an Vadvanced position above the tip end'of the bobbin, thread-de'iiecting means arranged `in the path 'of movement of thread passing from the thread guide in its advanced position, thereby to cause the thread guide to lay a finding bunch fof 'filling on the bobbin in spaced relation "to thesaid main package. l

3. In a iilling bobbin Winder, the combination of means for supporting Aand rotating a bobbin, an oscillating thread guide member, cloning mechanism, 'a rod member secured at one .side of the Winder, means forming a part fof fthe ydoiiing mechanism for retracting said rod during the doiling cycle, a stop member fixed on the rod, a tailpiece extending from the oscillating 'thread guide into lthe path of movement of the stop member on the rod during the dofiing cycle, said tailpiece, When the vrod is retracted, wbeing adapted to move the thread guide vinto an :advanced position above the bobbin `'tip and threaddeiiecting means for limiting the traverse of the thread as it passes from the thread guide in its advanced position.

4. In Ya filling bobbin Winder, the combination of means for supporting and rotating abobbin, an oscillating thread guide member, doiling mechanism, a retracting rod member arranged 8 at vone side `of the Winder, land bearing members at opposite `ends of the Winder for receiving the extremities of said roda pivoted member engaging 'said rod, a cam responsive to movement of the dofng mechanism, operatively connected to the isaid vpivoted member, thereby to retract the rodmember when the doffing mechanism is actuated, a stop member fixed on the said retracting rod, saidloscillating thread 'guide member having an extension 'projecting angularly downward into the path yLof movement of the stop member,

said extension being effective upon engagement by Ithe stop lmember to `move the thread lguide Yinto an advanced position above the `bobbin extremity, 4and `means `for limiting the traverse of vvthe thread 'passing from the thread guide Vin vits advanced position.

5. l'In --a -iilling bobbin Winder, ymeans for ksupporting and rotating a bobbin, an oscillating thread guide member for Winding a main package von 'the lbobbin, 'dofling mechanism including 'adoing shaftextendingout from one side of the Winder, a icam member fixed on the shaft for causing :retraction fof the thread guide member, 'means or advancing ithe thread Yguide and building a 'finding -bunch of iilling on lthe bobbin in vspaced relation '-to the said main package, said means including a builder .cam secured on the doiiing shaft adjacent Lthe said retracting cam, saidbiiilder cam being so positioned on the shaft lin relation `to the retracting `cam as to provide 'an intervalibetween the lbunch building or thread -guide advancing lmovement and retraction of the thread guide member.

A'fnfafiilling vbobbin Winder, means for supporting and rotating a bobbin, an oscillating thread guide member for Winding a main packvage 'on 'the bobbin, doiiing vmechanism including a -doiiing shaft extending out from one side 4of the Winder, a cam member iixed on -the shaft for causing retraction of the thread guide, means Tior advancing the thread'guide land 'building a 'iindirig bunch of filling on Ythe -bobbin in'spaced relation to fthe 'said ma'in package, said means `including a -builder cam secured on the ldoiiing shaft 'adjacent 'the said Aretracting cam, vsaid builder cam being adjustable relative to the re- '.tracting cam yin order to vary the number of turns-onthe said spaced-apartiinding bunch of filling.

`'1. 'Inv-a 4filling-bobbin Winder, means for supporting and vrotating a bobbin, an oscillating thread vguide member for `Winding a main packl ageon'lt'heT-bobbin, doiiing mechanism including a doi-ling shaft extending -out from one side of "the Winder, -a cam member xed on the shaft Aforicausing retraction of the thread guida'means for Vvadvancing the `thre-ad'guide and applying a iinding bunch'of `vfilling on the bobbin in spaced relation'to the said 'main package, saidmeans including abuil'der cam secured on the dofiing vshaft vadjacent the said retracting cam, said builder cam beingformed With a slot, a fastening vmember extendin'g'through the slot'and engaging Withthe retracting cam, the respective posi- -tionso'f the builder cam and retracting cam on the-doifingshaftbeing adjustable so that said Adoiiing shaft'atithe beginning of its rotation ac- 'tuates the buildercam vand atvthe latter part of its rotation-actuatesthe r'etracting cam.

18. In a'lling bobbin Winder, means for build- -ing'a finding bunch of iilling in spaced relation 'to a -main -package on -the bobbin including Aa :traversing yarn guide, means for applying adhesive vxnaterlalto the bunch as it is beine huit said adhesive applying means including a supporting member, a pivoted arm mounted on the supporting member, an adhesive applicator received at the end of the pivoted arm, said applicator including a tubular member and valve means for permitting release of adhesive material therefrom, and a member projecting from said supporting member and into the path of said traversing yarn guide to be moved thereby when the yarn guide is moved to finding bunch building position, until the applicator is brought into engagement With the yarn in said bunch, whereby said pivoted arm is controlled by movement of the nding bunch building means for applying the adhesive.

9. In a filling bobbin Winder, means for supporting and rotating a bobbin, an oscillating thread guide member for Winding a nlling thread to form a main yarn package and a tip filling bunch on said bobbin and means for moving said oscillating thread guide member into an advanced position overlying the end of the bobbin, a thread-deecting element arranged to lie in the path of movement of the thread as it passes `from the oscillating thread guide member in its advanced position, a supporting member within which said thread-deflecting element is secured, a block mounted to pivot on the supporting member, a projecting stop member xed in the pivcted block and lying in a position in which it is engaged by the said thread guide when the latter is moved into its advanced position, an adhesive applicator element carried by the said pivoted block, said applicator being adapted to be moved as the thread guide member contacts the said projecting stop member, into a position to contact and to apply adhesive to the said tip filling bunch as it is being Wound.

l0. In a filling Winder, means for supporting and rotating a bobbin, an oscillating thread guide member for Winding a main package and a tip finding bunch on the bobbin, dofling means including a dofng control shaft, cam means mounted on said doling shaft, a lever resiliently mounted and having a toe in contact With the cam, a rod member secured to the lever, a stop member fixed adjacent the opposite end ofthe rod, said thread guide having a projecting end disposed so that during its progressive movement it is engaged by the said stop member, a threaddeiecting stop mounted in the path of movement of the thread passing from the thread guide When it assumes a position to Wind the tip bunch, and a sealing mechanism cooperating with the movement of the arm of the thread guide member as it moves into its tip bunch Winding position, said sealing mechanism being adapted to apply a controlled amount of adhesive material to turns of filling supplied from the thread guide during Winding the tip bunch.

11. In a iilling bobbin Winder, means for supporting and rotating a bobbin, an oscillating thread guide member for Winding a main package and a tip finding bunch on the bobbin, a movable arm through Which the thread is passed, said arm being responsive to drop in thread tension for initiating the movement of mechanism to interrupt the operation of the Winder, dofng mechanism including a doiiing shaft extending out from one side of the Winder, means for advancing the thread guide after completion of the main package to Wind the nding bunch of filling on the bobbin in spaced relation to the said main package. said means including a tip bunch controlling builder cam secured on the cloning shaft,

a pivoted stop member movable to a position in the pathway of said movable arm and means responsive to movement of the tip bunch controlling builder cam and interconnected to said pivoted stop member for preventing the arm from moving suiiiciently to initiate stopping of the machine during Winding the tip nding bunch.

12. In a machine for Winding a yarn package, means for supporting and rotating a core on Which said package is to be formed, an oscillating guide member for traversing the yarn along the core to build a main yarn package thereon, means for terminating the winding of the main package and for rapidly moving the oscillating guide to a position for Winding its yarn at a point closer to the tip end of the core and spaced from the adjacent end of the main package, and a stop member functioning between the oscillating guide member and core for engaging the yarn to conne its traverse to a distance substantially less than that imparted by the guide thereby to Wind a relatively small, tip finding bunch.

13. In a machine for Winding a yarn package, means for supporting and rotating a core on Which said package is to be formed, an oscillating guide member for traversing the yarn along the core to build a main yarn package thereon, means for terminating the Winding of the main yarn package including a cam group rotatable at a predetermined point in the Winding cycle, and means responsive to movement of one of the cams which comprise said group for rapidly moving the oscillating guide to a position for winding `its yarn at a point closer to the tip end of the core and spaced from the adjacent end of the main package, a yarn stop member for coniining the traverse of the yarn within a distance less than the traverse imparted by the guide to Wind a relatively small tip finding bunch, and means responsive to another of said cams which comprise said group for terminating the Winding of the tip bunch by returning the oscillating guide to its original position at the base of the package.

14. In a machine for Winding a yarn package, means for supporting and rotating a bobbin on which said package is to be formed, an oscillating yarn guide for traversing the yarn and means for progressively moving said guide along the bobbin to build a Weft Wound, main yarn package thereon, means for terminating the Winding of the package and for controlling the doiing thereof Which includes a doiiing shaft and cam group carried thereby, said shaft and cam group being rotatable for a single revolution at a predetermined point in the Winding cycle, and means tripped by one of the cams in said group and engageable With a portion of said oscillating guide means for rapidly moving it to a position for Winding its yarn at a point closer to the tip end of the bobbin and spaced from the adjacent end of the main package, a yarn stop member for confining the traverse of the yarn Within a distance less than the traverse imparted by the guide to Wind a relatively small tip nding bunch, and means responsive to another of the cams of said group for terminating the Winding of the tip bunch by returning the oscillating guide to its original position at the base of the package.

15. In a machine for Winding a yarn package, means for supporting and rotating a core on Which said package is to be formed, an oscillating guide member for` traversing the yarn along the core to build a main yarn package thereon, means for terminating the Winding of the main package and for rapidly moving the ocillating guide to a position for winding its yarn at a point closer to the tip end of the core and spaced from che adjacent end of the main package, and means comprising a stationary yarn engaging stop member for substantially decreasing the eiective length of traverse of the yarn as controlled by the oscillating guide member thereby to wind a relatively small tip finding hunch,

16', A method of building a yarn package and tip finding bunch on a core which comprises thel steps of forming a main yarn package on; the core and terminating said main yarn package at a substantial distance from the tip end of the core. continuing the winding ortho yarn at a point more closely adjacent the tip end of the core and spaced from the adjacent end of the lmain yarn package to form a tip bunch, and applying adhc sive to the convolutions of yarn in the tip bunch after the start of winding thereof to adhere the said convolutions together Without adhering the bunch itself to the surface of' the. core.V

17. A method of building a yarn package. and tip finding bunch on a core which. comprisesthe steps of forming a main yarn package on the core and terminating said main yarn package at a. substantial distance from the tip end f the core, continuing they winding of the yarn at a point more closely adjacent the tip end of the core andy spaced from the adjacent end ofthe main yarn package to form a tipbunch, andl applying` adhesive to the convolutions of yarn inthe tip bunch after Winding at least one layer of yarn on the core thereby to'adhere the convolutions together without adhering the bunch itself to the surface oi' the core.

1a. A method of winding c yarn. package and tip finding bunch on a bobbin whichl comprises the steps of forming a mein yarn package by traversing the yarn along the bobbin and building the package to a point at which it is terminated at a substantial distance from the tip end of the core, continuing the windine:v of the Yarn at a point more closely adjacent the tip end of the bobbin and spaced from the adjacent end of the main yarn package to formy a tip bunch, and applying adhesive to the convolutions' of yarn in the tip bunchl after winding at least one complete layer thereof' on the bobbin to adhere the said convoluticns together without adhering the bunch itself tothe surface of the core.

19. A method or'winding c weft yarn package and a tip finding bunch on a bobbin which comprises the steps of forming a main yarn package on the bobbin by traversing the yarn and building the package to a point at which it is terminated at a substantial distance from the tip end ci the bobbin, continuing the winding oi the yarn at a point more closely adjacent the tip end of the bobbin and spaced from the adjacent end of the main yam package tc form a tip bunch, and, after winding atleast one complete layer 0f Yam at the tip bunch, applying an adhesive to the ccnvolutons of yarn thereafter wound in the tip bunch thereby to adhere the bunch together without adhering it to the surface 0f the bobbin.

20, A winding machine including means Vfor rototing a winding bobbin, a thread guide cooperating with the winding bobbin to distribute the thread into a main wound body thereon, means for shifting the thread guide from a position adjacent to the tipv portion of the bcbbin to a position adjacent to the position to be occupied by the base of the next -bobbin to be wound, a guide member positioned to intercept the thread adjacent to the region between the main wound body and the tip of the bobbin, and means for rotating the bobbin toA wind end-iinding coils between the main wound body and the tip of the bobbin While the thread is guided onto the bobbin by said guide member.

EDWARD J. BERRY.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,444,414 Colman Feb. 6, 1923 1,670,860 Lehman May 22, 1928 1,731,501 Noel Oct. 15, 1929 1,734,539 Summey' Nov. 5, 1929 1,736,314 Holcombe Nov. 19, 1929 2,035,721 Reiners et a1. Mar. 31, 1936 2,395,891 Lodge Mar. 5, 1946 FOREIGN PATENTS Number Country Date 25,327 Australia Feb. 25, 1930

Images